GTA 5 Wiki Guide

Dialling Digits

This achievement/trophy is available to unlock after Lvl. 20 although many people have not unlocked the call until Lvl. 25 at the highest.

After completing a certain mission involving Lester you will unlock the ability to call Merryweather air-support to assist you in killing some people. This involves them sending a helicopter to help you.

Loading

Be aware though, calling Merryweather and asking for assistance costs you $5,000.

Once you finish the phone call to request assistance, the achievement/trophy will unlock.